Improvement of grafting procedures for the ornamental species: II. Abies concolor [(Gord. & Glend.) Lindl].
The achieved results concerning the grafting silver-fir - Abies concolor [(Gord. & Glend.) Lindl] scions on white-fir (Abies alba Mill.) rootstocks are reporting in this article. The double-side-veneer grafting method and the plastic tape and the ecological Ceraltin® wax were applied in four experimental variants. The side-veneer-grafting method and the classic materials, such as raffia and the hot wax were used at the two controls involved in this experiment. The grafting success expressed in percents, were transformed in arcsin square root of percent values, and a two-way analysis of variance was performed. Highly significant (p<0.001) statistical differences were found between grafting variants, including controls. The Duncan Multiple Range Test showed that the four experimental grafting variants were highly significantly (p<0.01) better than the two controls. The grafting success of the best experimental variant has surpassed the two controls by 129 and 153%, respectively. Consequently, the double-side-veneer grafting method, the new developed plastic tape and the ecological Ceraltin® wax have contributed to this grafting success owing to which they are recommended to be used for grafting silver-fir ornamental trees.